NEED HELP Only one copy of diablo may run at a time?

By few days i cant open more than one copy of the game....the eurobattle.net shotcut icon disappeared from my desktop. I have to open the game from the d2 folder. By the way only one copy of the game can be opend.
PS: it seems that the europebattlenet.exe file disappeared.

Any suggestion?

 

Maybe i solved.... it's avast antivirus that block europebattlenet.exe. Every time i try to open the game the icons disappear. When i disable avast the game works.

Now i have to undestands how to fix it for playing while avast is on.... :confused1:

SOLVED! IN the avast exclusionlist, i have added europebattlenet.exe. :thumbup: